void main() {
    //字面量与变量的拼接
    String name = "Tom";
    System.out.println("Hello, " + name + "!");

    //多个字符串字面量连续拼接
    System.out.println("ja" + "va" + " " + "8");

    //数字字面量与字符串的拼接顺序
    System.out.println(1 + 2 + "3");
    System.out.println("1" + 2 + 3);
}